Caogebonden

Caogebonden is a Dutch term used in several scientific contexts to describe calcium that is chemically bound to other molecules or surfaces, in contrast with free calcium ions (Ca2+) in solution. The precise meaning depends on the discipline, but it generally refers to calcium that is not readily exchangeable or dissolved.

In soil and geochemical studies, caogebonden calcium denotes the fraction of calcium that is incorporated into the soil matrix and attached to mineral surfaces or organic matter. This calcium is often part of carbonate or silicate minerals, or it is bound to organic material, making it less mobile and less available for plant uptake than the exchangeable or dissolved fractions. The concept helps explain nutrient retention, liming effects, and long-term calcium cycling in soils.

In nutrition, dairy science and food chemistry, caogebonden calcium can refer to calcium that is bound within complexes such as casein micelles, or bound to other macromolecules in a way that reduces its immediate bioavailability. The distinction between bound and unbound calcium can influence texture, stability, and mineral nutrition.

Analytical approaches commonly used to study calcium binding include sequential extraction and spectroscopic or chromatographic techniques that separate exchangeable, carbonate-bound, organically bound, and mineral-bound calcium. The term caogebonden emphasizes the non-free state of calcium, though its exact interpretation varies with context. Related terms include bound calcium, chelated calcium, and calcium complexes.